centos安装python与jdk

安装python

#压缩包安装
[root@china ~]# yum -y install zlib*
Loaded plugins: fastestmirror, refresh-packagekit, security
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
base                                                                                                                             | 3.7 kB     :
extras                                                                                                                           | 3.4 kB     :
updates                                                                                                                          | 3.4 kB     :
Setting up Install Process
Package zlib-1.2.-.el6.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package zlib-devel.x86_64 :1.2.-.el6 will be installed
---> Package zlib-static.x86_64 :1.2.-.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================================================
 Package                                Arch                              Version                                 Repository                       Size
========================================================================================================================================================
Installing:
 zlib-devel                             x86_64                            1.2.-.el6                            base                              k
 zlib-static                            x86_64                            1.2.-.el6                            base                              k

Transaction Summary
========================================================================================================================================================
Install        Package(s)

Total download size:  k
Installed size:  k
Downloading Packages:
(/): zlib-devel-1.2.-.el6.x86_64.rpm                                                                                        |   kB     :
(/): zlib-static-1.2.-.el6.x86_64.rpm                                                                                       |   kB     :
--------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                    kB/s |   kB     :
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : zlib-devel-1.2.-.el6.x86_64                                                                                                       /
  Installing : zlib-static-1.2.-.el6.x86_64                                                                                                      /
  Verifying  : zlib-devel-1.2.-.el6.x86_64                                                                                                       /
  Verifying  : zlib-static-1.2.-.el6.x86_64                                                                                                      / 

Installed:
  zlib-devel.x86_64 :1.2.-.el6                                           zlib-static.x86_64 :1.2.-.el6                                          

#python安装

[root@china python_tools]# ll
总用量
-rw-r--r--  root root  5月    : Python-3.6..tgz
[root@china python_tools]#
[root@china python_tools]#
[root@china python_tools]#
#以root权限打开终端，进入安装包的存放路径，解压安装包：
[root@china python_tools]# tar -xzvf Python-3.6..tgz
#进入解压好的安装包路径：
[root@china python_tools]# cd Python-3.6.

#编译安装包，指定安装路径，并执行安装命令：
#注意：prefix参数用于指定将Python安装在新目录，防止覆盖系统默认安装的python
[root@china Python-3.6.]# ./configure --prefix=/usr/local/python36
[root@china Python-3.6.]# make && make install
#修改系统默认的Python路径，因为在终端中输入Python命令时默认是指向Python2.6.6
[root@china Python-3.6.]# mv /usr/bin/python /usr/bin/python-2.6.
建立新的软连接，指向Python-3.6.：
注：这里的python36是第4步指定的安装路径，python3.6是Python包里的可执行程序
[root@china Python-3.6.]# ln -s /usr/local/python36/bin/python3. /usr/bin/python
[root@china Python-3.6.]# python
Python 3.6. (default, May   , ::)
[GCC 4.4.  (Red Hat 4.4.-)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
、因为yum是依赖python的，所以这里我们修改了默认的python,就要要修改yum，让其运行指向旧的版本：
vi /usr/bin/yum
将第一行中的“#!/usr/bin/python”
修改为“#!/usr/bin/python-2.6.”，保存即可

安装pip

解决pip is configured with locations that require TLS/SSL问题

yum install openssl openssl-devel

[root@china Python-3.6.]# rpm -qa|grep openssl
openssl-devel-1.0.1e-.el6.x86_64
openssl098e-0.9.8e-.el6.centos..x86_64
openssl-1.0.1e-.el6.x86_64

cd /root/python_tools/Python-3.6./Modules
vim Setup
#修改配置

# Socket module helper for socket()
_socket socketmodule.c

#SSL=/usr/local/ssl
_ssl _ssl.c \
        -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
        -L$(SSL)/lib -lssl -lcrypto

修改完毕后保存。
# 重新编译
[root@china Python-3.6.]# make && make install

[root@china Python-3.6.]# python3
Python 3.6. (default, May   , ::)
[GCC 4.4.  (Red Hat 4.4.-)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>>
[root@china Python-3.6.]# pip3 install lxml
Collecting lxml
Downloading https://files.pythonhosted.org/packages/a7/b9/ccf46cea0f698b40bca2a9c1a44039c336fe1988b82de4f7353be7a8396a/lxml-4.2.1-cp36-cp36m-manylinux1_x86_64.whl (5.6MB)
% |████████████████████████████████| .7MB 38kB/s
Installing collected packages: lxml
Successfully installed lxml-4.2.

安装java

[root@china javatools]# chmod a+x jdk-6u45-linux-i586.bin
[root@china javatools]# ./jdk-6u45-linux-i586.bin
#修改jdk目录
[root@china javatools]# mv jdk1..0_45/ /usr/java/jdk1..0_45
[root@china javatools]# ls
jdk-6u45-linux-i586.bin
[root@china javatools]# cd /usr/java/
[root@china java]# ls
jdk1..0_45
[root@china java]# cd jdk1..0_45/
#设置环境变量
vi /etc/profile
在最后加上:

##use for JAVA 1.6

JAVA_HOME=/usr/java/jdk1.6.0_45
PATH=$JAVA_HOME/bin:$PATH
CLATHPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
export JAVA_HOME PATH CLATHPATH

检查环境变量是否配成功：
echo $JAVA_HOME
echo $PARH
echo $CLATHPATH
检查jdk是否安装成功
[root@china jdk1..0_45]# java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) Server VM (build 20.45-b01, mixed mode)
[root@china jdk1..0_45]# javac
用法：javac <选项> <源文件>
其中，可能的选项包括：
  -g                         生成所有调试信息
  -g:none                    不生成任何调试信息
  -g:{lines,vars,source}     只生成某些调试信息
  -nowarn                    不生成任何警告
  -verbose                   输出有关编译器正在执行的操作的消息

升级openssl（拓展）

wget https://www.openssl.org/source/openssl-1.0.2h.tar.gz

tar xzvf openssl-1.0.2h.tar.gz

cd openssl-1.0.2h

./config --prefix=/usr shared zlib-dynamic

#提醒需要在build之前做make depend
make depend

rm -f /usr/bin/openssl
rm -f /usr/include/openssl
make && make install
ln -sf /usr/include/openssl/*.h /usr/include/
ln -sf /usr/lib/openssl/engines/*.so /usr/lib/
ldconfig -v

openssl version -a
[root@china bin]# openssl version -a
OpenSSL 1.0.2h  3 May 2016
built on: reproducible build, date unspecified
platform: linux-x86_64